Fuel-feeding apparatus



P. A. KINZIE.

FUEL FEEDING APPARATUS.

APPLICATION FILED IuNE 1o, I92I.

I 1,424,486. y l Patented Aug. l, 1922,

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Specification of Letters Patent.

Patented Aug. l, 1922.

Application filed June 10, 1921. Serial No. 476,597.

To all whom t ,ma concern.'

Be it known that PHILLIP ALEXANDER KIetzIE, a citizen of the United'States of America, residing at Littleton, county of Arapahoe and Stateof Colorado, have invented a new and useful Fuel-Feeding Arapahoe, andState of Colorado, have inspecification.

My invention relates to a new automatically operating pressure feedingapparatus for the gasoline or other fuel used in internal combustionengines.

And the objects of my invention are:

First. To provide a pressure feeding apparatus thatwill force thegasoline or other fuel into the carburetor by air pressure and that willautomatically regulate the pressure of the air.

Second. To provide a pressure feeding apparatus for internal combustionengines that is so connected to one of the cylinders of the engine thatthe explosions in that cylinder will act to pumpingly compress air anddeliver it to the top of the main gas'- oline or other fuel supply tank,and that forces the gasoline from the main supply tank into an auxiliarytank placed above it, from which it flows to the carburetor, and fromthe carburetor as an explosive mixture, into the engine cylinder, towhich my pressure fuel feeding apparatus is connected, as well as to theother cylinders of the engine.

Third. To provide a pressure feeding gasoline or other fuel apparatusfor internal combustion engines, that automatically compresses air byapumping-mechanism that receives its operative power from the expansiveforce of the exhaust gases at the time of the spark explosions of thegasoline or other fuel explosive mixture in one of the cylinders of theengine, and that conveys the air to the main f uel supply tank of theengine,and that is provided with a safety valve that automaticallyregulates the air pressure in the fuel supply tank to that pressure bestadapted to even pressure flow of the fuel to the carburetor.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, in which- Figure l is a side elevation of my gasoline fuelpressure feeding apparatus, operatively connected to the main gasolinesupply tank and to a cylinder of an internalcombustion engine.

Fig. 2 is a plan view of my gasoline pressure feeding apparatus forinternal combustion engines, showing a small portion of its casingbroken away to show the internal construction of a part of it.

Fig. 3 is a section through the back fiame preventing chambered casingof the pressure feeding apparatus.

F ig.' 4 is a longitudinal, central section through the air compressingpump portion f liy gasoline pressure feeding apparatus.

Fig. 5 is a longitudinal, central sectional view of the air compressingpump showing slight variations and changes in some of its parts, and ofits back flame preventing chambered casing. l

Similar letters of reference refer to similar parts throughout theseveral views.

My invention has been especially designed to be attached to the alreadyinstalled and operatin internal combustion engines of automoblles,trucks, marine boats, flying machines, and especially to the engines oftractors; and it is directly connected to one of the cylinders of theengines and also to their gasoline supply tank and to their carburetors;and the preferred arrangement and construction of my gasoline or otherpressure fuel feeding apparatus is as follows:

In Figures 1 2, 3 and 4 I illustrate a different shaped air compressingpump than is shown in Figure 5, and there are slight differences inconstruction between the two, but the general constructive features andarrangement of the several parts relative to each other is practicallythe same, while their operating function of compressing air and forcingit into the main gasoline supply tank is the same.

As Figures -i and 5 are complete sectional views. and as they show thetwo different arrangenlents of some of the partsof the air compressingpumps through their piston cylinders, they will be described first, andthe same reference numerals will be used for both of these viewswherever the parts are alike or similar to each other.

The numeral 1, designates the casing of my complete air compressingpump, the principal difference being that the casing in Figure 4 isprovided with a back fire preventing chambered casing 2, that is cast onone side of the casing l, while the cascasing 31, that is provided witha back liring tubular casing 2A. Each of these back firingv chamberedmembers will be fully explained hereinafter.

The casings 1, of Figures 4 and 5, are provided with an air compressingchamber 3, which is provided with air inlet apertures 3A, that extendinto and through the casing 1. y

The casing 1, of both Figures 4 and 5, is preferably cast integrallywith a removable cover 4, of an auxiliary gasoline tank 5, although thecover may be removably secured to it ifA desired.

One end 6, of the casing is either provided with a reduced nippleportion 7, or Withan interiorly threaded aperture 7A, to which one endof a pipe 18, is connected. This pipe 8, is provided with any suitableconnecting fitting that can be threaded over the nipple 7, or threadedinto a removable valve seat bushing 8A, which is preferably inserted inthe end of the casing 1, of Figure 4, rather than forming the valve Seatin the casing itself. The opposite end 9, of the pipe 8, is threadedinto a threaded aperture 10, that is formed in the top portion of one ofthe cylinders 11, of the engine 12', just above the end of the upperstroke of the engines piston, which is not illustrated.

The threaded aperture 10, in the cylinder, is one of those that wasoriginally'made to receive a priming cup, but the priming cup has beenremoved, and the end 9,.of the pipe 8, is connected to it.

The engine 12, is provided with the commonlv used gasoline supply tank14, which I will call the main gasoline supply tank,`

and a pipe 15, extends from the bottom of the main gasoline supply tank14, to the bottom of the auxiliary tank 5, through which it extendsupwardly within the tank 5,.from its bottom by means of an extensionpipe 16, that is connected to the pipe 15, at the bottom of the tank bysuitable pipe and tank fittings. This pipe 16, extends from the bottomof the tank upwardly to close to the underside of its cover 4, and thegasoline in the main gasoline supply tank 14, is forced up into theauxiliary tank 5, which is positioned above it, by compressed air, aswill be fully described hereinafter.

To the bottom of the auxiliary tank I secure one end of a pipe 17, theopposite end of which extends to and. is connected to a carburetor 18,which is connected by a manifold 18A, to the cylinder 11. The carburetoris positloned enough below the auxiliary tank to allow the gasolinetherein to flow readily from the auxiliary tank 5, to it.

The casing 1, of the air compressing cylinder 3, is preferably madeabout three and a half inches lon and it is preferably only aboutseven-eig ths of an inch in diameter,

and to facilitate making c0nnections,its opposite ends 19, arepreferably made of hexagon form. y

The air compressing chamber 3, is preferably about a half inch indiameter, and extends throughout its length to close to its nippleend.7, where it is intersected by a small aperture 7A, that is formedthrough4 the axial center of the nipple 7, of Figure 5, or through thevalve seat plug 8B. The intersecting shoulder of the cylindrical chamber3, and the axial aperture through the terminal nipple 7, or at the endof the bushing 8A, is provided with a valve seat 8C, and a ball valve20, (which is only shown in Figure 5,) which is normally held againstits seat by a reciprocating piston 21, that is actuated in one directionof its reciprocal movement by an expansion spring 22; the piston afterpassing the air inlet port 3A acts to compress the air that freelyenters the chamber 3, through the air inlet apertures 3^, that areformed through the shell of the casing 1.

The entrance to the rear end of the cylinder bore of the air compressingchamber 3, is interiorly threaded, and an adjustable plug 23, is.threaded into it, and the rear end of the spring 22, bears against ashoulder 22A, formed on it. The outer end of which is provided with awrench receiving end 24, by which it may be adj ustably turned in thecasing. This plug 23, is provided with axial apertures 25 and 26, ofdifferent diameters, which extend in end to end alinement entirelythrough it. The largest aperture 25, is` at its outer end, and -itcontains a tapered valve seat 27, at its inner end, against which a ballvalve 28, that -controls the s aperture 26, is normally held by anexpansion tension spring 29, the outer end of which abuts against theend of a reduced threaded nipple portion 30, that is formed on the endofa T-shaped safety valve casing 31, in Figure 5, andagainst a disk'31A,

in Figure 4, which is secured in the outer end of the plug 23. Thissafety valve casing 31, which is only shown in Figure 5, contains anaxial bore of two different di-v ameters, 32 and 33, and an air outlethole 34, is formed through the casing into the largest aperture 32,close to the tapered shoulder at the junction of these two apertures,which forms a seat for a ball valve 35, and an expansion tension spring36, that is adjustably held against the ball Valve by a plug 37, that isadjustably threaded into the end of the aperture 32, of the casing 31.This safety valve casing 31, comprises a small T-shaped casting that hasa depending nipple portion 38, which `is provided with an axial aperture39, and the terminal end of the nipple is connected to one` end of theback fire preventing chambered casing 2A, and the opposite end of the acountersunk recess that back lire preventing chambered casing 2A, isthreadedto one end of a pipe 40, in Figure 5, and this pipe 40, is alsoconnected in Figure 1, to the lower end 41, of the back lire preventingchambered casing 2, and the opv posite end of the pipe 40, extends toand is connected to the top portion of the main gasoline supply tank 14.

The piston 21, is provided with oil grooves 21A, and the front end ofthe piston shown in Figure 5, is provided with lits partially over theball valve 20. This ball valve 20, is dispensed with in Figure 4, andinstead of it, the end of the piston is taper pointed to lit against thevalve seat 8C.- The rear end of the spring 22, bears expansively againsta shoulder 41, formed on the inner end of the plug 23. Consequently thisexpansion tension spring 22, holds the piston normally under a constantresilient pressure that normallly holdsl the inner end of the aperture7A, closed so that no gases or air can escape past it and iow back intothe cylinders 11, through the pipe 8, when the piston thereof makes itsdownward strokes, as will be fully explained hereinafter. Consequently,the piston 21, Ican be used either with or without the ball valve 20, asdescribed.

The air compressing cylinder, with its two valves and the piston and thesprings that actuate them in one direction of their movement, I term anair compressing pump, as it intermittently pumps air on top ofthegasoline. in the main ga'solline supply tank 14.

The back lire preventing chambers 2 and 2A, are arranged as follows: Theair compressing pump construction of Figures 2, 3 and 4, and its backlire preventing chambered casing 2, represents my preferredco-nstruction, as it is especially adapted for use on engines ofhighpowered automobile cars, trucks, tractors, marine and flying machineengines, although the air pump illustrated lin Figure 5, and its backfiring preventing chambered casing may be used if desired.A Its smallerback firing preventing casing and pressure escaping mechanismadapts itImore for use on the general sizes of smaller motors of cars and trucksthan the larger sizes shown in Figures 2, 3 and 4. The principle ofconstruction and operation, owever, is substantially the same in bothdevices.

The chambered casing 2, is larger in diameter than the chambered casing2A, but each is provided with a number of disks of fine wire gauzescreens' 42, of which there are ve shown in each of the chambers 43, ofthe casings 2 and 2^, and they are held in place by turned-up or cuppededges 44, that lit against the wall of the chamber.

The 10W/er screen disk rests o-n a shoulderv piston.

45, and the other four disk screens rest on top of each other at theiredges.

In the air compressing pump illustrated in Figures 1 and 4, the air, asit is compressed by the piston 21, flows from rthe large axial aperture25, which contains the spring 29, through radial holes 46, into andthrough a passageway 47 that is formed in the casings 1 and 2', into thechamber 43, of the casing 2, instead of through the safety T-shapedmember 31, of Figure 5, and instead of the pressure relief valve 35, andits spring 36, in Figure 5, the chambered casing 2, is provided with aremovable cap 48, that is secured to the casing by screws 48A, and thatis provided with an upwardly projecting hub 49, that contains a threadedaperture, in which an adjustable plug 50, is threaded. The plug 50, isprovided with an axial aperture in which a valve stem' 51, fitsslidingly, on the lower end of which a flat thin beveled edge valve 52,that sets on a bevel edged valve seat that is formed inl the upper edgeof the chamber 43, is placed.

The upper end of the valve stem is provided with a screwdriver'receiving slot 53, by which the valve can be turned and ground on.its seatto insure that it will seat much more evenly than it would ifleft in a stationary position thereon.

On the valve stem 51, below the end of the plug 50, and between it andthe top of the valve 52, an expansive coiled spring 54, is placed, whichnormally holds the valve 52,- against its seat, by its expansiveresilient pressure against the valve.

The bottom of the cap 48, of the chambered casing 2, is provided withradial grooves 55, which permits the excess air pressure that flows intoth-e chamber 2. from the air compressing chamber 3, of the casing 1, toescape to the atmosphere, where it is under pressure to lift the flatvalve 52. This adjustable valve mechanism with its air escaping grooves55, is the equivalent of the ball valve 35, and its spring 36, and theair escaping apertures 34, in the T-shaped casing 31.

The operation of my pressure fuel feeding apparatus is as follows:

As each and every spark explosion takes place at the upper end of thecylinders 11,

enough exhaust gas is forced by the compreive explosion in the cylinderthrough the pipe 8, and the aperture 7A, of the nipple 7, of the casing1, to move the piston 21, backward against its spring 29, which com,-p-resses air in the chamber 3, that enters it through the air inletapertures 3A, which are positioned in the casing 1, at the rear end ofConsequently, the j interior of the chamber 2, is always normally lilledwith air that Hows freely into it through the apertures 3A, in the shellof its casing, and at each ex- 3, of the a1r compressing cylinderplosion stroke ofthe engine of the cylinder 11, asmall quantity ofexhaust gases-is driven through the pipe 8, and the aperture 7A, againstthe liston 21, which is driven vio- -lently back from its seat againstits spring 22, and the piston 21, on this violently quick backwardstroke compresses the air in the chamber 3, and forces it through theaperture 26, in the plug 23, through which it is forced against the ballvalve 28,- that is moved back a ainst its spring 29, allowing thecompresse air to flow into the apertures 33 and 39, in the T -shapedsafety valves casing 31, from which it flows through the dependingtubecasing 2A, containing gauze wire screen 42, which. prevents anypossibility of flame from the explosion in the cylinder 11, from movingthrough the pipe 40, to the main fuel tank 14. The compressed air,however, flows throughl the pipe 40, into the 4tank 14, and exerts apressure on the top surface of the gasoline supply therein, that forcesit to flow up through the pipes and 16, into the top of the auxiliarygasoline supply tank 5, and from this auxiliary tank the gasolineflowsalso by pressure, through the pipe 17, to the carburetor 18, throughwhich it passes and'flows from it through the manifold 18A, as explosivegas into the cylinder 11, of the engine 12. Consequently, air is pumpedintermittently at each explosive stroke of the piston in the cylinder11; as the pipe 8, of my pump is connected to only one of the four ormore cylinders the engine motor may have, but the explosions in this onecylinder are suflicie-ntto keep the main gasoline supply tank 14, filledwith an air pressure that forces an abundant supply of gasoline up intothe auxiliary tank 5, and more air will be compreed and pumped into themain gasoline supply tank than is necessary, for when the airv pressureis too great, the gasoline is forced too fast into the auxiliary tankand from it into the ca-rburetor, and it is consequently necessary touse the tension of the spring 36, of the safety ball valve 35, so thatit will let the air pressure escape through the aperture 34, in Figure5, to maintain onlythat pressure which will force the gasoline to feedproperly from the main gasoline tank tothe auxiliary tank, and from itto the carburetor.

My invention provides a positive and reliable pressurefuel feedingapparatus for internal combustion engines requiring no attention orassistance lfrom the driver, which removes the necessity of having anauxiliary unit such as the commonly used hand or manually operated pumpvrequired in present systems in use, for producing pressure upon themain gasoline tank, when the motor has been stopped and left standing inan inoperative condition for any length of time, and while I haveillustrated its re- 35 ferred construction and arrangement, do

lll)

not wish to be limited to it, as changes may be made without departingfrom the spirit of my invention. r

Having described my invention, what l claim as new and desire to securebyv Letters Patent, is:

' 1. A pressure having an apertured member connected to the cylinders ofsaid engine at its fuel explosion end, and provided with an aircompressing chamber, a valve seat in said chamber at the passage leadingto said cylinder, and means including a piston lreciprocally mounted insaid chamber and bearing against said valve seat for controlling saidpassage. Y

ternal combustion engines, comprising a casing having an aperturedmember connected to the cylinders of said' engine atlits fuel explosionend, and provided with an air compressing chamber, a. valve seat in saidchamber, controlling the passage leading to said cylinder, a sprlngactuated reciprocating member in said chamber arranged to control saidvalve seat, and an adjustable plug in said chamber arranged to adjustthe pressure of said spring aga-inst said reciprocating member. i

3. A pressure feedingl apparatus for internal combustion engines,comprising a casing having an apertured member connected to thecylinders of said engine at its fuel explosion end, and provided with anair compressing chamber, and a vpassageway from said cylinder into saidchamber; with a reciprocating member in said chamber arranged to controlsaid passageway, and an adjustable plug in said chamber arranged toadjust the pressure o f said spring against said piston, said casingbeing provided with air inlet apertures between said reciprocatingmember and said plug.

4. A pressure feeding apparatus for inter- -nal combustion engines,comprising. a casing having an apertured member connected to thecylinders of said engine at its fuel explosion end, and provided with anair compressing chamber, avalve in said chamber controlling the passageleading -to said cylinder, a spring actuated piston .reciprocallymounted in said chamber and bearing against said valve, and anadjustable plug in said chamber arranged t0 adjust the pressure of saidspring against said piston, said casing being provided with air inletaperfeeding apparatus for internal combustion engines, comprislng a.casing pressure feeding apparatus for iny tures between said piston andsaid plug, said plug being provided with an axial aperture, and a springcontrolled valve seated in said aperture. f

5. A pressure nal combustion engines, comprising a casing having anapertured member connected to the cylinders of said engine at its fuelexfeeding apparatus for interl plosion end, and provided with an aircompressing chamber, a valve in said chamber controlling the passageleading to said cylinder, a spring actuated piston reciprocally mountedAin said chamber' and bearing against said valve, and an adjustable plugin said chamber arranged to adjust the pressure of said spring againstsaid piston, said casing being provided with air inlet apertures betweensaid piston and said plug, said plug being provided with an axialaperture, and a spring controlled valve seated in said aperture, and anaxial aperture T-'shaped casting provided with an outlet aperture andprovided with a pressure relief valve in its axial aperture.

6. A pressure feeding apparatus for internal combustion engines,comprising a casing having an apertured member connected to thecylinders of said engine at its fuel explosion end, and provided with anair compressing chamber, a valve in said chamber controlling the passageleading to said cylinder, a spring actuated piston reciprocally mountedin said chamber and bearing against said valve, and an adjustable plugin said chamber arranged to adjust the pressure of. said spring againstsaid piston, said casing being provided with air inlet apertures betweensaid piston and said plug, said plug being provided with an axialaperture, and a spring controlled valve seated in said aperture, and anaxial apertured T-shaped casting provided with an outlet aperture andprovided with a pressure relief valve in its axial aperture, said enginebeing pro-vided with a main supply tank, and said casing j beingprovided with an axially apertured depending nipple member, and a pipeconnected at one end to said nipple member and to thetop of the saidmain fuel supply tank.

7. A pressure feeding apparatus for internal combust-ion engines,comprising a casing having an apertured member connected to thecylinders of said engine at its fuel explosion end, and provided with anair compressing chamber, a valve in said chamber controlling the passageleading to said cylinder, a spring actuated. piston reciprocally mountedin said chamber and ,bearing against said valve, and an adjustable plugin said chamber arranged to adjust the pressure of said spring againstsaid piston, said casing being provided with air inlet apertures betweensaid piston and said plug, said plug being provided with an axialaperture, and a spring controlled valve seated in said aperture, and anaxial apertured T- shaped casting provided with an outlet aperture andprovided with a pressure relief valve in its axial aperture, said enginebeingv provided with a main supply tank, and said casing being providedwith an axially apertured depending nipple member,and a pipe connectedat one end to said nipple member and to the top of said main fuel supplytank, means for securing said air compressor to said auxiliary tank, anda pipe connected at one end to the bottom of said main fuel supply tank,and extending to and through and up into the top portion of saidauxiliary tank.

8. A pressure feeding apparatus for internal combustion engines,comprising a casing having an apertured member connected to thecylinders of said engine at its fuel explosion end, and provided with anair compressing chamber, a valve in said charnber controlling thepassage leading to said cylinder, a spring actuated piston reciprocallymounted in said chamber and bearing against said valve, and anadjustable plug in said chamber arranged to adjust the pressure of saidvspring against said piston, said casing being' provided with air inletapertures between `said piston and said plug, said plug being providedwith an axial aperture, and a spring controlled valve seated in saidaperture, and an axial apertured T-shaped casting provided with anoutlet aperture and provided with a pressure relief valve in its axialaperture, said engine being pro.- vided with a main supply tank, andsaid casing being provided with an axially apertured depending nipplevmember, and a pipe connected at one end to said nipple member vand tothe top of the said main fuel supply tank, an auxiliary fuel holdingtank above said main fuel tank, means for securing said air compressorto said auxiliary tank, andl a pipe connected at one end tofthe bottomof said main fuel supply tank, and extending to and through and up intothe top portion of said auxiliary tank, and a pipe secured to thelbottom of said auxiliary tank and extending to said carburetor.

9. A pressure feeding apparatus for internal combustion engines,comprising acasing having an apertured member connected to the cylindersof said engine at its fuel explosion end, and provided with an aircompressing chamber, a valve in said chamber controlling the passageleading to said l cylinder, a spring actuated piston reciprocallymounted in said chamber and bearing against said valve, and anadjustable plug in said chamber arranged to adjust the pressure of saidspring against said piston, said casing being provided with air inletapertures between said piston and said plug, said plug being providedwith an axial aperture, and a spring controlled valve seated in saidaperture, and an axial apertured T- shaped casting provided with anoutlet aperture and provided with 'a' pressure relief valve 125 in itsaxial aperture, said engine being provided with a main supplytank, andsaid'casing being provided with an axially apertured depending nipplemember, and a pipe connected at one end t0 said nipple member and 18,0

tothe top of the said main fuel supply tank, an auxiliary fuel holdingtank above said main fuel tank, means for securing said air compressorto said auxiliary tank, and a 'pipe connected at one end to the bottomof y to the bottom of said auxiliary tank and extending to saidcarburetor, and means Within the air compressing chamber of said airpumping cylinder for preventing back firing of the explosions inthefcylinder of said engine to which said air ump is attached.

10. A fuel pressure eeding apparatus for gasoline or other explosivefuel used in the cylinders of internal combustion engines', providedWith a carburetor .comprising an intermittent pump mechanism connecte-rlto oneof the cylinders of said engine, and an automatically operatedpressure regulating and safety valve, and arranged to'pump air into themain fuel supply tank of the engine, and means for forcingithe fuel fromthe main supply tank and feeding it to the carburetor of the engine. i11. A pressure feeding apparatus for internal combustion engines,comprising a casing having an apertured member connected to thecylinders of said engine at its fuel explosion end, and provided with anair compressing chamber, ber controlling the passage leading to saidcylinder, a spring actuated piston recipro- `cally mounted in saidchamber and bearing against said valve, and an adjustable plug in saidchamber arranged to adjust the pressure of said spring against saidpiston, said.

. casing being provided With air inlet aperaperture, said axial bear4against said valves actuating spring,

tures between said piston and said Plug, said plug being provided With`an axial aperture, and a spring controlled valve seated in saidapertures beingvof two different diameters, a spring actuated ball valveat the junction ofthe two diameters, and an adjustable Aplug threadedinto the end of the valve' aperture and arranged to whereby the saidvalvmaybe regulated to automatically regulate the pressure of the airbeing compressed in lsaid casings chamber and pumped into said mainfuell supply tank by said reciprocatingpiston actuated by the explosiveforce of the explosions of 'the explosive mixture in the cylinder toywhich said air compressor is attached. 12. A pressure feeding apparatusf or internal combustion engines, comprising a casing having anapertured member connected to the cylinders of said engine at its fuelexplosion end, and provided -With an air compreing chamber,-a valve insaid chamber controlling thepassage leading to said cylinder, a s ringactuated piston reciproeally inoun in said chamber and bearing a valvein said cham-- der and and connected thereto, to receive main fuelsupply ta-nk, means for securing l fsaid air compressing cylinder to thecover of said auxiliary tank, said carburetor piping connected to thebottom of Said auxiliary tank and extending to said carburetor, andmeans including a pipe for conveying the air compressed in said chamberto the top of said main fuel supply tank, whereby a small portion of theexplosive force of the intermittent explosions o-f the explosive mixturein the cylinder to Which said air compressing and pumping cylinders isattached, compresses air in said cylinder and pumps it int-o the tcp ofsaid main fuel supply tank, from Which it is forced by said air pressureup into said auxiliary tank, from Which. it flows to said carburetorfrom which, the explosive mixture flows into the cylinders, said aircompressing and pump-ing cylinder is attached to.

13. ln a gasoline or other explosive fluid pressure feeding apparatus ofthe carburetors and cylinders of internal combustion engines, thecombination of a cylinder of the engine, and the main fuel supply tank,with an air compressing pump connected at one end to the fuel explodingpart of said cylinarranged to force air into said main fuel supply tank,and provided With a back fire stopping and preventing chambered casing,the chamber of which is provided With a plurality of gauze Wire screens,and with a spring controlled pressure relief valve. lll. In a gasolineor lother explosive fluid pressure feeding apparatus for the carburetorsand cylinders of internal combustion engines, the combination ofacylinder of the engine, andthe main fuel supply tank, With an aircompressing pump connected at one end to the fuel exploding part of saidcylinder and arranged to force air into said main fuel supply tank, andprovided with a back fire stopping and preventing chambered casing, thechamber of which is provided With aplurality of auze vvirescreens,

and with a spring contro ed pressure relief A valve, an auxiliary fuelholding tank positioned above said main fuel supply tank e therefrom,and a carburetor connected operatively to said auxiliary tankand to saidcylinder, whereby said pump receives explosive pulsations from saidcylinder and compresses and forces air into said main fuel tank andforces the fuel from it up into said auxiliary tank, from which it flowsby pressure into said carburetor, an'd from it into said cylinder.

l5. In a gasoline or other explosive fluid pressure feeding apparatusfor the carburetors and cylinders of internal eombustio-n engines, thecombination of a cylinder of the engine, and the main fuel supply tank,

- with an air compressing pump connected at one end to the fuelexploding part of said cylinder and arrange-d to force air into saidmainfuel supply tank, and provided with a back fire stopping andpreventing chambered casing, the chamber of which is provided with aplurality of gauze wire screens, and with a spring controlled pressurerelief valve, said screens being arranged across said chamber in thepath of the compressed air flowing into said main fuel supply tank, andsaid pressure relief valve comprising a disk-shaped valve seated in saidchamber,

an adjustable plug threaded in said chamber, a valve stem on said valveslidably mounted on said plug, and an expansive pressure spring mountedon said valve stem between said plug and said disk Valve, and arrangedto normally hold said disk valve closed against its seat in said chambercasing, and against the air pressure therein, and air escaping aperturesextending through said casing from said chamber above the openingmovement of said valve.

In testimony whereof I ailiX my signature in presence of two Witnesses.

Witnesses THEO. BORGSTEDT,

GLADYS SPENGLER.

